In this paper, we present a practical password scheme due to Spilman, which is perfectly secure in the bounded retrieval model, assuming ideal hash functions. The construction is based on a hash-like function computed by a third party “facilitator”. The facilitator is trusted, and security derives from the facilitator’s long random secret, although the adversary is assumed to be able to retriev...

a bstract background:  one of the key strategies in students’ learning is the in fl uence of models on them. understanding the factors affecting the implementation of role-modeling process in education will help to make greater use of this training strategy. this study aimed to understand the experiences of role model instructors and nursing students about the facilitator factors in the role-mo...

In a search for genes responsible for the accumulation of antimonite in Escherichia coli, TnphoA was used to create a pool of random insertional mutants, from which one antimonite-resistant mutant was isolated. Sequence analysis showed that the TnphoA insertion was located in the glpF gene, coding for the glycerol facilitator GlpF. The mutant was shown to be defective in polyol transport by Glp...

Work in the new millennium requires globally distributed organizational members to collaborate in groups and make decisions. In general, research has shown that groups that use facilitators and group support systems make high quality decisions in less time. The Skilled Facilitator approach is a values-based systemic methodology that helps facilitators and groups interact successfully. Today’s f...

In this paper, we describe a trust mechanism that is implemented with an agent facilitator, which is a typical mechanism for mediating agents in multi-agent systems. Although many facilitators are based on tracking the capabilities of each agent, they do not track the dynamic relationships between participants necessary for ecommerce, most especially that of trust. We propose to add a trust mod...

This paper addresses the need for automated facilitation to buttress facilitation efforts in managing behavior in the virtual environment. We assert that it is within this environment that we need to concentrate our efforts as the nature of virtual work brings added challenges to successful facilitation. We propose the concept of embedded facilitation in which we implant intelligent agent based...

The role of a facilitator is key to the effective establishment and sustainment of Communities of Practice (COP). This paper presents a taxonomy of facilitation tasks that have to be carried out to support various COP processes that take place during the different stages in a COP’s life-cycle. Inspired by facilitation research in the area of Group Support Systems (GSS), we identified 33 facilit...

In many agent-mediated electronic marketplaces, a facilitator is exploited to conduct matchmaking in finding agents with the same interests. During matchmaking, the consideration of newcomers and group matchmaking is crucial since favorable newcomers can bring preferable offers to the facilitator for generating better matches and hence maximizing the agents’ utility gains, furthermore, group ma...

OBJECTIVES To compare learning outcomes and perceptions of facilitator behaviours and small-group process in problem-based learning (PBL) groups led by students and those led by faculty. DESIGN A prospective, Latin-square cross-over design was employed. Second-year medical students participated in 11 PBL cases over the course of the academic year. For each case, half the student groups were l...

Long RNA substrates are inefficiently cleaved by hammerhead ribozymes in trans. Oligonucleotide facilitators capable of affecting the ribozyme activity by interacting with the substrates at the termini of the ribozyme provide a possibility to improve ribozyme mediated cleavage of long RNA substrates. We have examined the effect of PNA as facilitator in vitro in order to test if even artificial ...